Search Results for author: Sam Devlin

Found 30 papers, 12 papers with code

Visual Encoders for Data-Efficient Imitation Learning in Modern Video Games

no code implementations4 Dec 2023 Lukas Schäfer, Logan Jones, Anssi Kanervisto, Yuhan Cao, Tabish Rashid, Raluca Georgescu, Dave Bignell, Siddhartha Sen, Andrea Treviño Gavito, Sam Devlin

Video games have served as useful benchmarks for the decision making community, but going beyond Atari games towards training agents in modern games has been prohibitively expensive for the vast majority of the research community.

Atari Games Imitation Learning

Adaptive Scaffolding in Block-Based Programming via Synthesizing New Tasks as Pop Quizzes

1 code implementation28 Mar 2023 Ahana Ghosh, Sebastian Tschiatschek, Sam Devlin, Adish Singla

We introduce a scaffolding framework based on pop quizzes presented as multi-choice programming tasks.

Navigates Like Me: Understanding How People Evaluate Human-Like AI in Video Games

no code implementations2 Mar 2023 Stephanie Milani, Arthur Juliani, Ida Momennejad, Raluca Georgescu, Jaroslaw Rzpecki, Alison Shaw, Gavin Costello, Fei Fang, Sam Devlin, Katja Hofmann

We aim to understand how people assess human likeness in navigation produced by people and artificially intelligent (AI) agents in a video game.


Trust-Region-Free Policy Optimization for Stochastic Policies

no code implementations15 Feb 2023 Mingfei Sun, Benjamin Ellis, Anuj Mahajan, Sam Devlin, Katja Hofmann, Shimon Whiteson

In this paper, we show that the trust region constraint over policies can be safely substituted by a trust-region-free constraint without compromising the underlying monotonic improvement guarantee.

Contrastive Meta-Learning for Partially Observable Few-Shot Learning

1 code implementation30 Jan 2023 Adam Jelley, Amos Storkey, Antreas Antoniou, Sam Devlin

We evaluate our approach on an adaptation of a comprehensive few-shot learning benchmark, Meta-Dataset, and demonstrate the benefits of POEM over other meta-learning methods at representation learning from partial observations.

Few-Shot Learning Representation Learning

Imitating Human Behaviour with Diffusion Models

1 code implementation25 Jan 2023 Tim Pearce, Tabish Rashid, Anssi Kanervisto, Dave Bignell, Mingfei Sun, Raluca Georgescu, Sergio Valcarcel Macua, Shan Zheng Tan, Ida Momennejad, Katja Hofmann, Sam Devlin

This paper studies their application as observation-to-action models for imitating human behaviour in sequential environments.

UniMASK: Unified Inference in Sequential Decision Problems

1 code implementation20 Nov 2022 Micah Carroll, Orr Paradise, Jessy Lin, Raluca Georgescu, Mingfei Sun, David Bignell, Stephanie Milani, Katja Hofmann, Matthew Hausknecht, Anca Dragan, Sam Devlin

Randomly masking and predicting word tokens has been a successful approach in pre-training language models for a variety of downstream tasks.

Decision Making

Trust Region Bounds for Decentralized PPO Under Non-stationarity

no code implementations31 Jan 2022 Mingfei Sun, Sam Devlin, Jacob Beck, Katja Hofmann, Shimon Whiteson

We present trust region bounds for optimizing decentralized policies in cooperative Multi-Agent Reinforcement Learning (MARL), which holds even when the transition dynamics are non-stationary.

Multi-agent Reinforcement Learning

You May Not Need Ratio Clipping in PPO

no code implementations31 Jan 2022 Mingfei Sun, Vitaly Kurin, Guoqing Liu, Sam Devlin, Tao Qin, Katja Hofmann, Shimon Whiteson

Furthermore, we show that ESPO can be easily scaled up to distributed training with many workers, delivering strong performance as well.

Continuous Control

Strategically Efficient Exploration in Competitive Multi-agent Reinforcement Learning

1 code implementation30 Jul 2021 Robert Loftin, Aadirupa Saha, Sam Devlin, Katja Hofmann

High sample complexity remains a barrier to the application of reinforcement learning (RL), particularly in multi-agent systems.

Efficient Exploration Multi-agent Reinforcement Learning +2

Navigation Turing Test (NTT): Learning to Evaluate Human-Like Navigation

1 code implementation20 May 2021 Sam Devlin, Raluca Georgescu, Ida Momennejad, Jaroslaw Rzepecki, Evelyn Zuniga, Gavin Costello, Guy Leroy, Ali Shaw, Katja Hofmann

A key challenge on the path to developing agents that learn complex human-like behavior is the need to quickly and accurately quantify human-likeness.


The MineRL 2020 Competition on Sample Efficient Reinforcement Learning using Human Priors

no code implementations26 Jan 2021 William H. Guss, Mario Ynocente Castro, Sam Devlin, Brandon Houghton, Noboru Sean Kuno, Crissman Loomis, Stephanie Milani, Sharada Mohanty, Keisuke Nakata, Ruslan Salakhutdinov, John Schulman, Shinya Shiroshita, Nicholay Topin, Avinash Ummadisingu, Oriol Vinyals

Although deep reinforcement learning has led to breakthroughs in many difficult domains, these successes have required an ever-increasing number of samples, affording only a shrinking segment of the AI community access to their development.

Decision Making Efficient Exploration +2

Evaluating the Robustness of Collaborative Agents

no code implementations14 Jan 2021 Paul Knott, Micah Carroll, Sam Devlin, Kamil Ciosek, Katja Hofmann, A. D. Dragan, Rohin Shah

We apply this methodology to build a suite of unit tests for the Overcooked-AI environment, and use this test suite to evaluate three proposals for improving robustness.

Difference Rewards Policy Gradients

no code implementations21 Dec 2020 Jacopo Castellini, Sam Devlin, Frans A. Oliehoek, Rahul Savani

Policy gradient methods have become one of the most popular classes of algorithms for multi-agent reinforcement learning.

counterfactual Multi-agent Reinforcement Learning +2

"It's Unwieldy and It Takes a Lot of Time." Challenges and Opportunities for Creating Agents in Commercial Games

no code implementations1 Sep 2020 Mikhail Jacob, Sam Devlin, Katja Hofmann

We compare with literature from the research community that address the challenges identified and conclude by highlighting promising directions for future research supporting agent creation in the games industry.

Meta-Learning Divergences of Variational Inference

no code implementations6 Jul 2020 Ruqi Zhang, Yingzhen Li, Christopher De Sa, Sam Devlin, Cheng Zhang

Variational inference (VI) plays an essential role in approximate Bayesian inference due to its computational efficiency and broad applicability.

Bayesian Inference Computational Efficiency +4

AMRL: Aggregated Memory For Reinforcement Learning

no code implementations ICLR 2020 Jacob Beck, Kamil Ciosek, Sam Devlin, Sebastian Tschiatschek, Cheng Zhang, Katja Hofmann

In many partially observable scenarios, Reinforcement Learning (RL) agents must rely on long-term memory in order to learn an optimal policy.

reinforcement-learning Reinforcement Learning (RL)

Rolling Horizon Evolutionary Algorithms for General Video Game Playing

1 code implementation27 Mar 2020 Raluca D. Gaina, Sam Devlin, Simon M. Lucas, Diego Perez-Liebana

Game-playing Evolutionary Algorithms, specifically Rolling Horizon Evolutionary Algorithms, have recently managed to beat the state of the art in win rate across many video games.

Evolutionary Algorithms

Meta-Learning for Variational Inference

no code implementations pproximateinference AABI Symposium 2019 Ruqi Zhang, Yingzhen Li, Chris De Sa, Sam Devlin, Cheng Zhang

Variational inference (VI) plays an essential role in approximate Bayesian inference due to its computational efficiency and general applicability.

Bayesian Inference Computational Efficiency +4

Resource Abstraction for Reinforcement Learning in Multiagent Congestion Problems

no code implementations13 Mar 2019 Kleanthis Malialis, Sam Devlin, Daniel Kudenko

These are learning time, scalability and decentralised coordination i. e. no communication between the learning agents.

reinforcement-learning Reinforcement Learning (RL)

The Multi-Agent Reinforcement Learning in MalmÖ (MARLÖ) Competition

2 code implementations23 Jan 2019 Diego Perez-Liebana, Katja Hofmann, Sharada Prasanna Mohanty, Noburu Kuno, Andre Kramer, Sam Devlin, Raluca D. Gaina, Daniel Ionita

Learning in multi-agent scenarios is a fruitful research direction, but current approaches still show scalability problems in multiple games with general reward settings and different opponent types.

Multi-agent Reinforcement Learning reinforcement-learning +1

The Text-Based Adventure AI Competition

1 code implementation3 Aug 2018 Timothy Atkinson, Hendrik Baier, Tara Copplestone, Sam Devlin, Jerry Swan

In 2016, 2017, and 2018 at the IEEE Conference on Computational Intelligence in Games, the authors of this paper ran a competition for agents that can play classic text-based adventure games.

Board Games Natural Language Understanding

Domain Adaptation for Deep Reinforcement Learning in Visually Distinct Games

no code implementations ICLR 2018 Dino S. Ratcliffe, Luca Citi, Sam Devlin, Udo Kruschwitz

Many deep reinforcement learning approaches use graphical state representations, this means visually distinct games that share the same underlying structure cannot effectively share knowledge.

Domain Adaptation Multi-Task Learning +2

Win Prediction in Esports: Mixed-Rank Match Prediction in Multi-player Online Battle Arena Games

no code implementations17 Nov 2017 Victoria Hodge, Sam Devlin, Nick Sephton, Florian Block, Anders Drachen, Peter Cowling

Given the comparatively limited supply of professional data, a key question is thus whether mixed-rank match datasets can be used to create data-driven models which predict winners in professional matches and provide a simple in-game statistic for viewers and broadcasters.

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